Metallurgical furnace



B. TALBOT.

METALLURGICAL FURNACE.

APPLICATION FILED MARJZ'Q. 1920.

Patented July 5, 1921.

4 SHEETS-SHEET 1.

WW M B. TALBOT.

METALLUPGICAL FURNACE.

APPLICATION FILED MAR 29 1920 Patented July 5, 1921.

4 SHEETS-SHEET 3- B. TALBOT.

METALLURGICAL FURNACE.

APPLKCATION FILED MAR 29, 1920.

1,383,444, Patented July 5, 1921.

4 SHEETS-SHEET 4.

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BENJAMIN TALBOT, OF SOLBERGE, NORTH ALLERTON, ENGLAND.

METALLURGICAL FURNACE.

Specification of Letters Patent.

Application filed March 29, 1920. Serial No. 369,510.

To all whom it may concern Be it known that I, BENJAMIN TALBOT, a British subject, residing at Solberge, North Allerton, Yorkshire, England, have invented certain new and useful Improvements in Metallurgical Furnaces, of which the following is a specification.

This invention relates particularly to furnaces for the manufacture of iron and steel, and its primary object is to provide improvements for tilting regenerative furnaces of such character as to secure increased capacity and greater advantages in the ability to operate continuously with the maintenance on the hearth or hearths of a very large quantity of molten refined metal, by which comparatively uniform temperature conditions are possible, very rapid reductions are efiected upon the impurities of the relatively small addition of metal to be refined, and a larger store of standardized refined metalsis available for tapping at short intervals to supply refined metal in the quantities and at the times desired.

It is an object of my invention to provide a tilting construction that is adapted to be heated by gases always flowing in the same direction, and having integral means movable therewith for carrying the waste gases from the tapping end to the stationary flue leading to the regenerators, with which flue said means have a movable connection.

It is a further object of my invention to provide the construction at its tapping end with integral means whereby the furnace cinder can be collected and removed conveniently. I

An important object of the invention is to provide a construction having several refining chambers, preferably connected so that the metal can flow between them, com-- prising several hearths, several roofs for the respective hearths, and fiues for the respecti've chambers, to effect the desired heating operations by the introduction of the fuel thereto, the discharge of the waste gases therefrom and the regenerative use of such gases. I

In a furnace having twin or plural hearths connected by one or more ducts, as will be perceived, it is possible to treat and mm a larger volume of metal than would be practicable with a single hearth, which is limited in extent by insurmountable or seiriously objectionable structural considerations, as the impracticability of maintaining a slngle fiat furnace roof over a hearth beyond the limits structural weaknesses of extended single roofs, and the metallurgical undesirability of excessivelyarching an extended furnace roof as required for strength. The heat energy 1s, moreover, better conserved, the.

of constructions embodying the improvements thereof.

In the drawings, Figure 1 is a side elevation of a furnace made in accordance with my inventlon; Fig. 2 is a plan view of the same; F 1g. 3 is'a sectional view taken on the line 3 3 of Fig. 2; F igJi is a sectional view taken on the line 4 4 of Fig. 8; F 1g. 5 is a sectional view on the irregular line 5 5 of Fig. 4; Fig. 6 is a sectional view on the line 6 6 of Fig. 3; Fig. 7 is a sectional plan of a developed construction having connected twin hearths; Fig. 8 is a sectional view taken on the line 88 of Fig. 7; and Fig. 9 is a sectional view taken on the line 9 9 of Fig. 7.

Referring to Figs. 1 to'6 inclusive, the fur.- I

nace, in the particular form here illustrated, comprises a hearth 1 carried .by cross-beams 2 which are supported on the downwardly bowed longitudinal beams 3 having their ends connected to the end frames 4, in combination with the roof 5 and the walls 6, 7, '8and 9, supported by the cross-beams 10,

the longitudinal beams 11 connected with the beams l0 and the end frames, the verti cal stays 13 connected with the roof and hearth frames and the horizontal braces 13 connected with the vertical stays and the end frames.

This construction is carried through its beams 3 to the rockers 14 which are supported on the bases 15, tilting being effected bymeans of a hydraulic cylinder 16 pivotally connected to the bearing 17 and a coacting piston mechanism 18 pivotally connected to the bearing 19 fixed to the beams 3.

Patented July 5, 1921.

which'I desire to exceed, the r The forward or port end of the furnace is provided with the neck 20 having in the end thereof the passage 21, adapted to be capped and used for inspection, and the oil burner or fuel ports 22 which deliver to the throat 23, the transversegas passage 24; havingthe ports 25 which deliver to the bottom ,of the throat and the vertical air passages 26 which deliver to the throat from the transverse air flue section 27 disposed-in the v bottom of the neck, capped transverse passages 28 providing for inspection and access to the throat. V

The flue section 27 registers inmovable relation with the fixed air flue section 29 a tive valves 35 and 36 with the airducts 37 into which air is forced by the fan 38, op-

erated by the motor 39. The same ends of the regenerator chambers are connectedthrough the passages 40 and 41, under control of the valves 42 and 4:3, with the stack' The stationarywaste gas flue section 45 vdelivers to the regenerators 33 and 34%, un-

der control of the respective valves 45 and 45"" and is connected through a movable joint 46 with the waste gas flue section 47 fixed to and movable with the furnace, the joint being preferably in line with the axis of oscillation of the furnace. The flue section 47 communicates through the transverse fiue section 48 with thevertical waste gas flue sections 49 on opposite sides of the rear end of the furnace chamber and the tap hole 50 therein. The section 48 provides a pocket for cinder formed by the particles of oXid of iron and lime which are carried off with the waste gases and deposited in :the bottom-of the section whence such cinder is removed, preferably in liquid form.

Flues 52 provide for the circulation-of air adjacent to the tapping end of the furnace hearth and water channels 53 in the furnace walls-provide cooling means for the structurer I The-wall 6 contains the charging doors 54 and 54 disposed at higher elevations at the rear than at the front to avoid discharging'metal from the bath in tipping the furnace.

As illustrated in Figs. 7, 8 and 9, a twin furnace is provided in which the hearths 1 and 1 are connected through their back walls 7* and 7 by the ducts 55 and 56 adj acent respectively to the forward and rear ends of the hearths, to provide for the free circulation of metal between them.

The back walls 7 a and 7 the front walls 6 and '6", and the end walls 8, 8 and 9 9 together with connected frame work of with air passages between the walls 7 and 7".

Rockers 14. and 142 mil on as bases 15 scribed, including the fuel ports 22 and 22" and the air passages 26 and 26, the waste gases being "discharged through passages similar to those previously described, including the passage's49' and 49 The furnaces are provided with the-respective tap holes 50 and 50 Air cooling passages'52 and jacent' to their tapping ends and water cir- 52 are provided for cooling the'hearths ad-- culating means 53?and-f5?) are provided in the walls for cooling them.

Having described my inventioml claim: 1. A tilting furnace provided with means for the introduction'of fuel gas thereto atf one end thereof on one sideof its axisof' oscillation in combination" with means for discharging waste gases and means for discharging the metal therefrom at the other end-thereof on the otherside of said axis.

2. A tilting furnace provided with an .inlet passage for fuel gases and a-discharge "passage for waste gases,-in combination with valved passages comprising regenerators through which the waste gases from said: discharge passage are carried alternately,

and means for passing air to said inlet passage through said regenerators alternately with the passage of the waste gases there through. V

3. A tilting furnace provided with an inlet for the fuel gases and an outlet for-the waste gases in the oppositely oscillatory ends thereof, in combination with station- 7 ary valved passages comprising regenerator chambers through which-the waste gases from said outlet are carried alternately, and valved passages for carryingair to said inlet through said regenerators. alternately with the passage of the waste gases therethrough, said outlet having a vmovably jointedconnection with said stationary pas-i sages first named and said inlet having a movably jointed connection with. said pass sages secondnamed.

4. A tilting furnaceprovided with means for introducing the fuel" gases thereto and means for discharging the waste gases thereof, said discharging means comprising a, duct extending from the rear towardqthe front and movable with said furnace, in combination with stationary passages comprising regenerator chambers through which the waste gases from said duct are carried,

-12 o from in the oppositely oscillatory ends therestationary passages by which air is carried through said chambers tosaidinlet, and valves for alternatinggthe gas and air while;

hearths,

maintaining their constant directions in said chambers.

5. A tilting regenerator furnace provided with means comprising an inlet for supplying fuel gases thereto constantly at one end thereof and means comprising an outlet for discharging waste gases therefrom constantly at the other end thereof, said inlet and outlet being disposed so that they are oscillated in opposite directions by rocking said furnace.

6. A tilting regenerator furnace provided with means fixed thereto comprising an inlet for supplying fuel gases to the forward end thereof, means fixed thereto comprising a duct extending from the rear end to the axis of oscillation of said furnace for delivering waste gases therefrom, and fixed passages comprising regenerator chambers with which each of said means makes a movable joint.

7 A tilting furnace having means for discharging waste gases therefrom, said means comprising a hanging duct fixed to and movable with the discharging end of said furnace.

8. A tilting furnace having at an end thereof a duct and a pocket adapted to be lowered by tilting and to catch cinder discharged thereto.

9. A furnace having a plurality of hearths and one or more ducts connecting said hearths and adapted for connecting the metal baths thereon.

10. A furnace having a plurality of roofs for the respective hearths, and one or more ducts connecting said hearths and adapted for connecting the metal baths thereon.

11. A furnace having a plurality of hearths, roofs for the respective hearths, separated back walls having air passages between them for the respective hearths, and

one or more ducts connecting said hearths and adapted for connecting the metal baths thereon.

' 12. A tilting furnace having a plurality of metallurgical chambers, one or more ducts connecting said chambers, fuel inlets for the respective chambers at their corresponding ends, and waste gas outlets for the respective chambers at their corresponding opposite ends.

13. A tilting furnace having a plurality of metallurgical chambers, means for supplying fuel to the respective chambers independently and means for discharging waste gases from the respective chambers independently.

14. A plurality of furnace chambers having independent fuel inlets and independent waste gas outlets, a passage with which said outlets communicate, a pair of regenerator chambers, means comprising valve mechanism whereby said passage is connected with said regenerator chambers alternately, means for passing air through said regenerator chambers alternately, and means for delivering air? from the alternate regenerator chambers to the inlets of the respective furnace chambers.

15. A tilting regenerative furnace having a tap hole, waste gas passages on either side of said tap hole, and cooling passages disposed between said tap hole and the waste gas passages.

16. A tilting regenerative furnace having a tap hole, a waste gas passage, and means between the tap hole and gas passage for cooling the furnace hearth.

' In testimony whereof I have hereunto set my name this 15th day of March, 1920.

BENJAMIN TALBOT. 

